My daughters 1997 Toyota Corolla battery goes flat ( new battery ) three times , once while driving , checked charge rate and 13.4 volts , checked currant draw and .01 amp : charge light working as normal . The intermittent battery discharge is baffling me , it will go flat in a couple hours

Asked by GuruZYTCR Oct 16, 2017 at 08:39 AM about the 1997 Toyota Corolla Base

Question type: Maintenance & Repair

2 Answers

22,310

Are you checking this amp draw after car modules have gone to sleep? Also do not disturb them during test. Also check all your ground wires. Alternator, body and engine for resistance and corrosion. Thinking you have a bad alternator with that 13.4 rate as car is running. Turn on some high drain items while running car and see what voltage is. You might have a bad regulator or shorted diode in alternator.

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